JP2799538B2 - Parts supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component supply device, and is suitable for, for example, inserting a shaft-like component such as a flanged projection bolt into a hole of a steel plate component on a fixed electrode. I have.

[0002]

2. Description of the Related Art As this kind of prior art, Japanese Utility Model Laid-Open No.
There is an apparatus for feeding a welding bolt disclosed in Japanese Patent Publication No. 144278. FIG. 7 and FIG. 8 show a structure that summarizes the above. To explain the prior art, an openable / closable chuck 2 is installed at the tip of a supply rod 1 and a supply pipe indicated by a two-dot chain line just above it. 3 is arranged in a state fixed to the stationary member. The chuck 2 has a pair of jaws 4 and 5 mounted thereon in such a manner that the jaws 4 and 5 can be opened and closed by shafts 6 and 7, and a hole 8 as shown in FIG. . Although a spring force in the closing direction is applied to the chuck 2, it is not shown here. An arm 10 is supported on the supply rod 1 by a shaft 9, and an air cylinder 11 is connected to a tip of the arm 10. The air cylinder 11 strokes in a direction perpendicular to the plane of the drawing, and the chuck 2 is expanded by projecting a piston rod. When the component falls from the supply pipe 3 to the chuck 2 in the state of FIG. 7, the supply rod 1 advances to the position of FIG. 8, and then the arm 10 rotates to the position shown by the two-dot chain line (this rotation is The chuck 2 is expanded by the piston rod projection of the air cylinder 11 (performed by a driving mechanism not performed), and the extrusion of the component is completed.

Next, another prior art is disclosed in Japanese Utility Model Application Laid-Open No. 3-8.
A description will be given of an automatic welding component supply apparatus disclosed in Japanese Patent No. 5179, and its outline is shown in FIG. Here, members performing the same functions as those in FIGS. 7 and 8 are denoted by the same reference numerals, and detailed description thereof is omitted. The supply pipe 3 is welded to the arm 10, and when a part is supplied to the chuck 2, it is configured to retreat upward as shown by a two-dot chain line. A leg of the air cylinder 11 is slidably supported by a support shaft 12 connected to the supply rod 1, and the air cylinder 11 is fixed to a stopper piece 14 fixed to the supply rod 1.
Piston rod 15 is abutted. A pressing piece 16 is fixed to the right end of the air cylinder 11. When the supply rod 1 advances and the air cylinder 11 outputs, the pressing piece 16 expands the chuck 2 while pressing the component, and the component supply is completed.

[0004]

What is common in FIGS. 7, 8 and 9 is that the operation accuracy is normally maintained because the chuck is provided on the supply rod. Is very difficult, and since the parts are supplied from just above the chuck and sent out directly below, a mechanism for pushing and expanding the chuck is required,
In order to avoid interference with the supply pipe, either the air cylinder for pushing down the parts or the supply pipe needs to be retractable, so the structure is extremely complicated and the dedicated space required for it is also excessive. Problems.

[0005]

Means for Solving the Problems and Their Functions The present invention has been provided to solve the above problems.
The holding head is connected to the reciprocating supply rod, and the holding head is provided with a holding recess having a suction surface for components, and has an outlet opening corresponding to the holding recess and is fixed to a stationary member.
The fixed temporary fixing unit is adjacent to the holding head at the return position, and the parts in the temporary fixing unit are
A pushing means is provided for sending the component from the temporary fixing unit to the holding recess. It is held on the surface. Claim 2
In claim 1, the supply rod is disposed so as to advance and retreat obliquely downward from above the temporary fixing unit, and the holding head has a bent shape. By doing so, the adjacency with the temporary fixing unit is reliably established, and the holding head that has received the component advances smoothly. According to a third aspect of the present invention, in the first aspect, the holding head is provided with an extruding member that protrudes from the suction surface. It is inserted. According to a fourth aspect, in the first aspect, the magnet is buried in the attraction surface, and the component is securely held on the attraction surface by the attraction force of the magnet. A fifth aspect of the present invention is characterized in that, in the first aspect, the temporary fixing unit is provided with a temporary fixing chamber, and the temporary fixing chamber is provided with a component supply passage and an outlet opening of the component. The components that enter the temporary holding chamber from the component supply passage are sent out from the outlet opening into the holding recess. A sixth aspect of the present invention is characterized in that, in the fifth aspect, the magnet is buried in the stop surface of the temporary holding chamber, and the pushing means for feeding out the part from the outlet opening is provided. The surface is sucked and held by a magnet, and is sent out into the holding recess while being slid from the stop surface by the pushing means. A seventh aspect of the present invention is characterized in that, in the first aspect, the pushing member is supported by the holding head so as to be able to move forward and backward, and the operating pin is pressed against the end face of the pushing member from a direction inclined with respect to the moving direction. The operating pin changes the direction of the force while sliding on the end face of the pushing member, thereby causing the pushing member to protrude. Claim 8
Is a type in which a holding head is connected to a reciprocating supply rod, a part is held there and the part is supplied to a destination, and the holding head is disposed at a position separated from a virtual plane including the axis of the supply rod. The supply rod, the holding head, the temporary fixing unit, and the like are arranged collectively without interference due to the separation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the embodiment shown in FIGS. 1 to 4 will be described.
And a shaft portion 18, a flange 19 and a welding projection 20.
It is composed of Inside the temporary fixing unit 21, a temporary fixing chamber 22 is formed, in which a component supply passage 23 is opened and an outlet opening 24 is also opened, and as shown in FIG. To form a T-shaped opening. A stop surface 26 of the component 17 is formed on the cover plate 25, and a magnet 27 is embedded therein. Although the description has been changed, the main body 2 of the temporary fixing unit 21 is
8, a temporary fixing chamber 22 is disposed, an extrusion pin 30 serving as an extruding means is disposed in a through hole 29 opened in the main body 28, and integrated with a piston rod 32 of an air cylinder 31 connected to an end of the main body 28. When the extrusion bin 30 advances, the part 17 hits the upper part of the shaft 18 and the part 17 is moved out of the outlet opening 2.
Send it out from 4. The main body 28 is a stationary member 33.
To the temporary fixing unit
21 is fixed to the stationary member 33, the connecting pipe 34 continuing to the temporary fixing chamber 22 is welded to the main body 28, and the hose 35 is connected to the connecting pipe 34 to reach a parts feeder (not shown).

The holding head 36 is fixed to a supply rod 38 via a connecting plate 37, and a holding recess 3 is provided below the holding head 36.
9 are formed. FIG. 3 shows a state in which the holding recess 39 is viewed from below, which is just a horizontal U-shaped depression, and the right side thereof corresponds to the upper part of the outlet opening 24. A suction surface 40 is formed in the holding recess 39, and a magnet 41 is formed there.
Is buried. A large-diameter hole 42 and a small-diameter hole 43 are formed in the holding head 36, into which a plunger 44, which is an extruding member, is inserted.
Supported by. An air cylinder 46 is fixed to the coupling plate 37, and the tip of an operating pin 47 extending therefrom is in contact with the end face of the plunger 44. Since the supply rod 38 is inclined as shown in FIG. 1, the operating pin 47 also has the same inclination, and the holding head 36 has a bent shape as shown. The supply rod 38 is connected to the air cylinder 4
8, the cylinder is fixedly secured to the stationary member.

FIG. 4 shows the state of FIG. 1 viewed from directly above.
The arrangement of 1 and the holding head 36 is offset by L from the axis of the supply rod 38.

The target portion to which the component 17 is supplied is a through hole 52 of a steel plate component 51 which is a counterpart component, and a fixed electrode 53.
The steel plate part 51 is placed on the upper part, and the fixed electrode 53 has a through hole 5.
A receiving hole 54 communicating with 2 is opened. A movable electrode 55 paired with the fixed electrode 53 is provided coaxially with the fixed electrode.

FIG. 5 shows a modification of the pushing means 30, in which a pushing plate 49 is connected to the piston rod 32, and an inverted notch 50 is provided at the tip thereof. FIG. 6 shows a case where the aforementioned extruding member 44 is made of a resilient steel wire or a synthetic resin.
At the output of, and protrudes as shown by a two-dot chain line.

Referring to the operation of the embodiment shown in FIGS. 1 to 4, FIG. 1 shows that the component 17 enters the temporary fixing chamber 22 through the component supply passage 23 by air conveyance, and the flange 19 is When the pushing means 30 moves to the left, the part 17 is sent out from the outlet opening 24 toward the holding recess 39 while sliding on the stop surface 26. The flange 19 that has entered the holding recess 39 is positioned there and is held on the suction surface 40 by the magnet 41. Next, the supply rod 38 advances by the output of the air cylinder 48, and the shaft portion 18 is moved to the target position,
When it comes to a position coaxial with the through hole in the immediate vicinity of the hole, it stops there. Subsequently, when the operating pin 47 advances by the output of the air cylinder 46, the tip of the operating pin slides on the end face of the pushing member 44 and the pushing member 44 17 is forcibly pushed out, whereby the flange 19 is separated from the suction surface 40, and the shaft portion 18 is fitted into the through hole 52 and the receiving hole 54, and the component supply is completed. After the holding head 36 returns, the movable electrode 55 descends, and the welding ends.

The illustration of the air hoses for each air cylinder is omitted, and the air switching control valve and the electric control circuit for realizing the above-mentioned operation are those which are generally known. Detailed explanations and the like have been omitted.

[0013]

According to the present invention, since the part that has exited the temporary fixing unit is fed into the holding recess of the holding head and held on the suction surface thereof, the opening and closing type chuck structure as in the prior art is used. Can avoid problems with accuracy. The components are fed into the holding head along the suction surface of the holding recess and then pushed out in a direction away from the suction surface, so that the components are inserted from above the chuck as in the prior art, It is possible to avoid relying on an unstable chuck operation such as a method of pushing directly below. Since there is no need to employ a mechanism for retracting the air cylinder for ejecting parts or retracting the supply pipe for parts as in the prior art, it is possible to simplify the structure and to form a compact unit. This is convenient for supplying parts to narrow places. The relative positional relationship between the temporary fixing unit fixed to the stationary member and the holding head is important, and since one of them is stationary, it is easy to accurately set the relative positional relationship between the two. Further, since the pushing means advances from the stationary temporary fixing unit, the components can be transferred from the outlet opening to the holding recess with high accuracy, and the operation reliability of the apparatus is improved.
That is, since the outlet opening corresponds to the holding recess and the temporary fixing unit and the holding head at the return position are adjacent to each other, the extruded parts continuously and smoothly move from the outlet opening into the holding recess. And the operation is very accurate. The supply rod is arranged so as to advance and retreat diagonally downward from above the temporary fixing unit, and the holding head has a bent shape, so that continuity between the temporary fixing unit and the holding head can be easily obtained, and the holding head Can be immediately transferred from the place where the parts are received. The pushing member is supported by the holding head so as to be able to advance and retreat, and the operating pin is configured to be pressed against the end face of the pushing member from a direction inclined with respect to the advancing and retreating direction. Easy to implement.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a front view of a temporary fixing unit alone.

FIG. 3 is a plan view of the holding head as viewed from below.

FIG. 4 is a plan view showing a positional relationship between a holding head, a temporary fixing unit, a supply rod, and the like.

FIG. 5 is a plan view showing a modification of the pushing means.

FIG. 6 is a plan view showing a modification of the pushing member.

FIG. 7 is a simplified plan view showing a conventional technique.

FIG. 8 is a plan view showing a state where the one in FIG. 7 has advanced.

FIG. 9 is a simplified side view showing another conventional technique.

[Explanation of symbols]

 Reference Signs List 38 supply rod 36 holding head 17 component 40 suction surface 39 holding recess 24 outlet opening 21 temporary fixing unit 44 pushing member 41 magnet 22 temporary holding chamber 23 component supply passage 26 stop surface 27 magnet 30 pushing means 47 operating pin

Claims (7)

(57) [Claims] 1. A holding head is connected to a reciprocating supply rod, the holding head is provided with a holding recess having a suction surface for a component, and has an outlet opening corresponding to the holding recess and is fixed to a stationary member. A component supply device, characterized in that a temporary fixing unit is adjacent to the holding head at the return position, and is provided with a pushing means for sending out the component in the temporary fixing unit from the outlet opening toward the holding concave portion. 2. The component supply device according to claim 1, wherein the supply rod is disposed so as to advance and retreat obliquely downward from above the temporary fixing unit, and the holding head has a bent shape. 3. The component supply device according to claim 1, wherein the holding head is provided with an extruding member projecting from the suction surface. 4. The component supply device according to claim 1, wherein a magnet is embedded in the attraction surface. 5. The temporary fixing unit according to claim 1, wherein the temporary fixing unit is provided with a temporary fixing chamber, and the temporary fixing chamber is provided with a component supply passage and a component outlet opening. Parts supply equipment. 6. The component supply device according to claim 5, wherein a magnet is buried in a stop surface of the temporary holding chamber, and a pushing means for sending out the component from an outlet opening is provided. 7. The push-out member according to claim 1, wherein the push-out member is supported by the holding head so as to be able to advance and retreat, and the operating pin is pressed against the end face of the push-out member from a direction inclined with respect to the advance-retreat direction. Parts supply equipment.